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Dermatology > Dermatoses From Physical Factors > Flashcards

Dermatoses From Physical Factors Flashcards

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Dermatology Board Prep flashcards
1
Q

First degree burn

A

Congestion of superficial blood vessels

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2
Q

Superficial 2nd degree burn

A

Transudation of serum from capillaries -> edema

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3
Q

Deep 2nd degree burn

A

Pale and anesthetic

To reticular dermis

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4
Q

3rd degree burn

A

Appendages destroyed

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5
Q

What facilitates the removal of hot tar burns

A

Polyoxyethylene sorbitan or sunflower oil

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6
Q

Drugs that induce milia crystallina

A

Isotretinoin, doxorubicin, bethanechol

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7
Q

What layer is the injury to in miliaria rubria

A

Prickle layer = SS

“Prickly heat”

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8
Q

Miliaria pustulosa

A

Typically preceded by another dermatosis that blocks sweat ducts
Intertriginous, back of bedridden pts
Pustules Independent of hair follicles
Recurrent episodes in type 1 pseudohypoaldosteronism

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9
Q

Level of occlusion is miliaria profunda

A

Upper dermis

Usually lasts only an hour

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10
Q

Acrocyanosis but not raynauds

A

No ulceration

Not temporary

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11
Q

May induce acrocyanosis of nose, ears, dorsal hands

A

Inhaled butyl nitrite

  • AC also induced by IFN alpha
  • may be seen in anorexia
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12
Q

Puffy hand syndrome

A

Lymphedema due toe injection of narcotics to dorsal hand

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13
Q

Pernod may be presenting sign

A

Leukemia cutis

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14
Q

Treatment of frostbite

A

Rapid rewarming btw 37 and 43 degrees c

  • tpa may reduce amputation
  • arthritis may be a late complication
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15
Q

UV and clothing

A

Baggy clothes, clothes that have been washed more are more effective filters

*Tinosorb containing material for laundering = sunguard

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16
Q

Yellowish papules along the sides of the neck from sebaceous hyperplasia from sun damage

A

Fibroelastolytic papules of the neck

17
Q

Pearly papule on the face or chest from elastosis

A

Dubreuilh elastoma

18
Q

Effects of UV

A

Induce ROS through AP-1
Increases transcription of MMP 1 (collagenase) MMP 3 (stromoelysin 1), and MMP9 (gelatinase) to form collagen fragments
Increased deposition of fibulin 2
Decreased types 1&3 collagen

19
Q

Adult colloid millium derived from

A

Elastic fibers

  • associated with petrochemical exposure
20
Q

Juvenile colloid milium

A

Apoptotic keratinocytes

21
Q

Action spectra for photo allergy

A

320-425

22
Q

% of pmle patients with a positive ANA

A

10-20%

23
Q

PMLE action spectra

A

UVA (MC)&raquo_space; UVB or A+B&raquo_space; visible light

  • women more commonly sensitive to UVA alone, men more commonly to visible lt
24
Q

Actinic prurigo

A

May occur in sun protected sites like buttocks
60% resolve in 5 yrs in children, adults more persistent
Hardening does NOT occur

25
Q

Solar urticaria

A

UVA

26
Q

Drugs associated with solar urticaria

A

TCN (but not mino)
Chlorpromazine
Progesteronal agents
Repirinast

27
Q

SU associations

A

PCT, EPP, SLE

28
Q

Hydroa vacciniforme action spectra

A

UVA (330-360)

29
Q

What % of hiv pts have photosensitivity

A

5%, typically cd4<200

30
Q

Chronic actinic derm action spectra

A

UVA + UVB + visible MC > UVA + UVB > A or B

31
Q

Eosinophilic polymorphic and pruritic eruption associated with radiotherapy

A

Days to mo after

Not limited to radiation sites

32
Q

MC cancer after radiotherapy

A

BCC

*scc more common on dorsal hands

33
Q

MC site for pressure ulcer

A

Pelvic area

34
Q

Fracture blisters

A

Occur due to vascular compromise
Days to 3 weeks after
Esp lower leg

35
Q

Photosensitive tattoo pigment

A

Cadmium = yellow

36
Q

DLE has been reported in what color tattoos

A

Red

37
Q

Pseudolymphoma tattoo reaction

A

Red

38
Q

Granulomas

A

Silicone, mercury (sarciodal, positive gold lysis test), zirconium (a Lila, sarcoidal), silica (associated with systemic sarcoid)

Dermatology (28 decks)

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